CN1177104C - Automatic surface section instrument for detecting road surface flatness and its detection method - Google Patents
Automatic surface section instrument for detecting road surface flatness and its detection methodInfo
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- CN1177104C CN1177104C CNB011127961A CN01112796A CN1177104C CN 1177104 C CN1177104 C CN 1177104C CN B011127961 A CNB011127961 A CN B011127961A CN 01112796 A CN01112796 A CN 01112796A CN 1177104 C CN1177104 C CN 1177104C
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Abstract
The present invention relates to an automatic road-surface profile instrument for detecting road-surface flatness and a detecting method thereof, which belongs to the device detecting the road-surface longitudinal section profile and various road-surface flatness indexes and long-wave length, and steps of using the device for measuring the road-surface flatness. The profile instrument comprises a distance sensor, an angular sensor and a computer. In detection, the distance sensor and the angular sensor are used for measuring a distance signal and a gradient signal of a sampling point which are inputted into the computer; a road-surface longitudinal section profile curve, an international flatness index, mean square error, positive direction and reverse direction accumulated values and other flatness indexes are obtained by an analysis program. The present invention has the advantages of high automatic degree and can detect and analyze the construction quality of the road surface or evaluate the condition of the road surface used at present on site and correct the other existing flatting instruments.
Description
Detect the automation road surface section plotter and the detection method of surface evenness, the checkout gear that relates to a kind of surface evenness, particularly can measure the device of the surface evenness section curve that comprises the long wavelength, and adopt this device to carry out the method that surface evenness detects.
Surface evenness, promptly the flatness on road surface directly influences the safety of toter operations such as vehicle, aircraft, and occupant's level of comfort, so be one of important indicator during pavement quality evaluation and pavement construction are checked and accepted always.The planeness on various road surfaces that comprises the pavement of road, bridge access bridge road surface, aircraft airfield runway etc. of various grades such as speedway, ordinary road, the surface evenness on big slope particularly, except that the comfort level of direct reflection vehicle ', more can reflect its safety and useful life.In fact, surface evenness detects and should comprise greater than the short wavelength road surface (being that the road surface just changes road faster) of 0.3 metric wave length with less than the long long wavelength road surface of 30 metric waves.Because the relatively more responsive wave-length coverage of vehicle and passenger's road pavement planeness far surpasses about three meters short wavelength, especially under the situation of running at high speed, as on speedway, the passenger still has tangible reaction to long wavelength's road surface more, in addition to airfield runway, because the fuselage of aircraft is very long, when taking off and land, aircraft is more obvious to long wavelength's road surface (road surface long as 100 metric waves) reaction.Therefore require to measure the vertical section of road surface curve that has the long wavelength.
At present, surface evenness checkout gear and method roughly are divided into two big classes.The first kind is to adopt three meters rulers to lie on the road surface that needs detection, finds out the maximal clearance between three meters rulers and the road surface then, analyzes the smooth degree on this road surface from the size in gap.This detection method is very original, and its main problem has: detection speed is extremely slow, wastes time and energy, and can't detect long wavelength, big slope; Data acquisition is also very difficult, and main leaning on manually used dipstick metering, and because the span of three meters rulers is 3 meters, so can only detect the planeness of 3 metric wave length with interior short wavelength road surface, promptly can only measure 3 meters surface evenness in the little slope.In order to reduce labor intensity, make above-mentioned measurement become mechanization and adopt continous way roughness measurement instrument, this instrument the beam length of striding also be 3 meters, but rear truckle is as front and rear fulcrum before this instrument, can move forward continuously, measure and be spaced apart 3 meters the gap between beam and the road surface of striding by being arranged on the mensuration wheel of striding the beam mid point then, stride in the middle of the beam and measure recording gauge record this gap data that wheel is connected as a single entity by being cemented in simultaneously.Surpass the long oblique wave of 3 metric waves, i.e. long wavelength road surface but still can't detect.
The second class planeness checkout gear and method are during according to pavement roughness, and the distance between the car body of vehicle and the axletree can be subjected to displacement variation phenomenon along with the out-of-flatness on road surface, develop a kind of accumulation instrument that jolts and measure surface evenness.Because the change in displacement of these accumulations is exactly a roughness index.But owing to the vehicle mechanical characteristic can change along with the variation of time, and roughness index also is subjected to the influence of the vehicle mechanical characteristic and the speed of a motor vehicle, therefore will demarcate it through more accurate smoothness measuring equipment commonly used.And when measuring, require the speed of driving highly stable.Once depart from the given speed of a motor vehicle, this accumulation instrument that jolts will produce bigger detection error.In addition, the accumulation instrument that jolts has two basic limitations on using.At first, owing to be the detection method of response type, can't measure the vertical section of road surface section curve, the planeness that also just is not suitable for new pavement construction is checked and accepted.Secondly what utilize the accumulation of jolting instrument adopted is the detection method of response type, insensitive to the long wavelength road surface, detects so it can't the road pavement long wavelength carry out planeness.In a word, it also only is applicable to the planeness that detects the short wavelength road surface, and can't obtain section curve.
In sum, existing detection method of road-surface evenness is owing to can't obtain having long wavelength's vertical section of road surface curve, so be difficult to adapt to the needs of bridge access bridge, highway and airfield runway construction and management, on using, limitation is arranged, examination and evaluation can't be accomplished to be used for, planeness evaluation can be used for again existing road surface to new pavement construction quality.In the surface evenness detection technique, an important link is arranged, i.e. the demarcation of planeness detector in addition.All adopt international roughness index (IRI) as the reference point of demarcating at present both at home and abroad.For obtaining the IRI value, the vertical section of road surface section curve (wavelength is 0.3～30 meter a longitudinal section section curve) that then must have a kind of standard method to detect to have long wavelength and short wavelength.Because this quasi-instrument of domestic nothing can only calculate the IRI value by 1/4th vehicle simulation models again with the vertical section of road surface absolute altitude of measuring through the precision level of demarcating at a certain distance, could demarcate the smoothness measuring equipment that needs are demarcated for this reason.It is very time-consuming detecting the vertical section of road surface curve with precision level, effort, and efficient is extremely low, and can't directly read the IRI value.
The purpose of this invention is to provide a kind of section plotter that can simply accurately detect and read the IRI value that comprises long wavelength and short wavelength and vertical section of road surface section curve and other roughness index, another object of the present invention is to adopt this section plotter to obtain the detection method of vertical section of road surface section curve.
In order to achieve the above object, the present invention is performed such: the section plotter that detects surface evenness, form by computer and detection platform, detection platform is made of base plate and face shield, bearing, angular transducer and range sensor are housed on the base plate successively, by front propeller shaft assembling front-wheel, inter-axle shaft trailing wheel and single concave gear are housed respectively in the bearing, single concave gear is corresponding with the range sensor level, and the distance between the front and back wheel equals the girth of trailing wheel; Angular transducer is connected with computer by 232 interfaces with range sensor, calculates and draws the surface evenness section curve with angle and calculate various roughness indexs by the distance that default software in the computer will record.
Detect the method for surface evenness, comprise data acquisition unit and data analysis unit two parts, data analysis unit is the program with the VB language compilation: comprise 1/4th vehicle simulation models, second order dynamical equation, statistical method solution procedure.At first on highway section to be measured, select one and measure starting point and required measurement length; Then by section plotter range sensor that is provided with and the supporting collection of finishing range data of single concave gear that is contained on the inter-axle shaft, promptly when the unique recessed tooth of the single concave gear on the inter-axle shaft slips over range sensor surperficial, range sensor can produce a range pulse signal, receives by computer 232 interfaces; Meanwhile, when the computer expert crosses 232 interfaces and receives this pulse signal, promptly can sample to the angular transducer on the section plotter by 232 interface backspaces instruction, record the vertical road surface of this sampled point section with respect to horizontal angle, section plotter can guarantee trailing wheel girth of every walking, promptly can obtain a vertical section of road surface section angle of slope value; Convert measured continuous gap length and respective angles to corresponding serial digital signal by analog-digital converter at last, and 232 interfaces that pass through computer are imported computer, related software is analyzed under the computing in computer, calculate and draw and comprise short wavelength and long wavelength's whole road section surface longitudinal profile curve, and descend three kinds of calculating of example respectively: international roughness index IRI value is calculated, standard mean square deviation calculating and comprise the surface evenness value calculating of positive and negative direction aggregate-value; The output result shows and prints the Overall Steps of detection of end.
The present invention has following advantage:
1. because section plotter of the present invention adopts range sensor and angular transducer to obtain continuous sampling interval and vertical section of road surface angle of slope Value Data thereof synchronously, thereby can directly measure the vertical height of the each point of vertical section of road surface with respect to starting point, therefore luminous energy is not measured the short wavelength and can be measured long wavelength's vertical section of road surface section curve, can measure various surface evenness indexs simultaneously.
2. adopt method of the present invention directly to calculate the IRI value from the vertical section of road surface curve values of measuring that comprises long wavelength and short wavelength, therefore can be the user directly provides reliable IRI value, and has avoided the step of loaded down with trivial details demarcation and correlation analysis.Because in all roughness index calculated, the calculating of IRI value was the most complicated, is based on 1/4th vehicle simulation models and must depends on and separate the second order dynamical equation and just can draw.Because the present invention can detect the vertical section of road surface section curve that comprises short wavelength and long wavelength and obtain the IRI value, therefore also can be used for the demarcation to other evenness of road surface instrument.
3. because the present invention has adopted computerized detection technique, all data analyses can both be finished at the scene immediately, and can carry out real-time on-the-spot planeness analysis, can not only be directly used in examination and evaluation, also can be used for the planeness on existing road surface is detected and estimates long wavelength's pavement construction quality such as bridge access bridge, speedway on band slope.
Description of drawings
Fig. 1 is a section plotter internal construction schematic diagram of the present invention
Fig. 2 is the testing process figure of section plotter of the present invention
The road surfaces longitudinal profile curve synoptic diagram of Fig. 3 for recording with method of the present invention
Fig. 4 is a detection method software flow pattern of the present invention
Fig. 5 is for detecting the section curve figure on extremely smooth road surface with method of the present invention
Fig. 6 is for detecting the section curve figure on the road surface that has the scrobicula slope with method of the present invention
Fig. 7 is for detecting the section curve figure on the road surface that has high convex slope with method of the present invention
See also Fig. 1,2, section plotter is made up of computer and detection platform, detection platform is made of base plate 8 and face shield, intrinsic successively bearing 3, angular transducer 7 and range sensor 5 on the base plate 8, respectively by front propeller shaft assembling front-wheel 9, inter-axle shaft assembling trailing wheel 1, the distance between the front and back wheel equals the girth of trailing wheel in the bearing 3; Single concave gear 2 also is housed on the power transmission shaft of trailing wheel 1, and single concave gear 2 is corresponding with range sensor 5 levels, and single concave gear 2 is installed on the base plate 8 by support 4 and fixed screw 6.Angular transducer 7 is connected with computer by 232 interfaces with range sensor 5, calculates and obtain vertical section of road surface section curve and every roughness index with angle by the distance that default software in the computer will record.Trailing wheel 1 is taken turns by two and is formed and two fulcrums are arranged, so the fulcrum height of trailing wheel 1 is the average height of two trailing wheel fulcrum height.Spacing between the front and back wheel fulcrum is S=0.2～0.3 meter.For making the every walking of section plotter S distance obtain an angle value, have two the key links to guarantee: at first the girth of trailing wheel 1 is required to be S.Like this when trailing wheel circles, the section plotter S distance of just in time walking.Secondly must guarantee that section plotter must once be sampled to angular transducer 7 when trailing wheel 1 circles.This finishes by being contained in single concave gear 2 on the inter-axle shaft and supporting range sensor 5.The range sensor 5 that the present invention adopts is electromagnetic inductors.When the unique recessed tooth of single concave gear 2 slipped over range sensor 5 surperficial, range sensor 5 can produce a pulse signal.When trailing wheel 1 circled, range sensor 5 promptly can produce a pulse signal like this.When notebook computer receives this pulse signal by 232 interfaces, promptly can send instruction angular transducer 7 is sampled by 232 interfaces.This method of work can guarantee whenever section plotter walk forward S apart from the time, promptly can obtain a vertical section of road surface angle of slope value, thereby can draw the longitudinal section section curve of the shown whole road section surface that comprises long wavelength and short wavelength of Fig. 3.
See also Fig. 3, the detection method that adopts section plotter of the present invention to carry out surface evenness comprises data acquisition unit and data analysis unit two parts:
Data acquisition unit is performed such: at first select one on road surface to be measured and measure starting point O, when section plotter walking S apart from the time, the range sensor 5 of single concave gear 2 correspondences just obtains a pulse signal, by 232 interfaces input computer, the computer backspace is instructed to angular transducer 7, records this sampled point vertical section of road surface section with respect to horizontal angle a
K(K=1,2,3,,, N), convert measured continuous length and respective angles the 232 interfaces input notebook computer of corresponding serial digital signal to by the analog-digital converter that is provided with in the sensor by computer, by the programming language that in computer, is provided with the data of gathering are carried out computational analysis then, obtain the longitudinal section section curve of whole road section surface; And descend three kinds of calculating of example respectively: international roughness index IRI value, standard mean square deviation, comprise the surface evenness value of positive and negative direction aggregate-value; By computer display screen and printer curve or result of calculation are shown or print on demand at last, and finish all to detect step.
See also accompanying drawing 3, a
1, a
2, a
3,,, a
N-1, a
NFor by the angular transducer on the checkout gear at the angle of slope that the premises records with respect to horizontal longitudinal section section, after analog-digital converter is transformed into string character, import 232 interfaces.Here N is the sample points of sampling.y
1, y
2, y
3,,, y
N-1, y
NBe the each point height with respect to starting point (highly being 0), y
1=S Sin (a
1)
y
2＝y
1+S?Sin(a
2)＝S[Sin(a
1)+Sin(a
2)]
y
3＝y
2+S?Sin(a
3)＝S[Sin(a
1)+Sin(a
2)+Sin(a
3)]
y
k＝y
k-1+S?Sin(a
k)＝S[Sin(a
1)+Sin(a
2)+…+Sin(a
k-1)+Sin(a
k)]。
Overflow relatively behind the low frequency aberration signal that becomes by the high-pass filter elimination that is provided with in the computer, enter data acquisition program and DAP successively, the present invention adopt the VB program language as programming language to realize sampling routine and data processor.Program is assembled into software package executable after through compiling, can be installed on the notebook computer of any window that has a Microsoft, and need not the support of VB program language.The road surfaces longitudinal section section curve that records can be shown by the former; The computational analysis of being undertaken by the latter can obtain the vertical height of the each point (every the S distance) of vertical section of road surface with respect to starting point, thereby obtains IRI and other surface evenness.The roughness index analytical model comprises the IRI value that is calculated by 1/4th vehicle simulation models, and vertical section of road surface standard mean square deviation surpasses given absolute discrepancy in elevation cumulative frequency, and the positive and negative unidirectional accumulation discrepancy in elevation etc.
See also Fig. 4, the software divided data collecting unit of detection method of the present invention and data analysis unit two parts, concrete steps are as follows:
A. input parameter: on road surface to be measured, select and measure starting point O, and set and detect distance;
B. cross-sectional data collection: adopt the checkout gear of charged brain to be advanced to terminal point to be measured from starting point O, the base plate 8 of this checkout gear is provided with range sensor 5, angular transducer 7 and front and back wheel, the girth of trailing wheel 1 is set at the spacing (promptly equaling sampling interval S) that equals front and rear wheel, single concave gear 2 row intrinsic on the section plotter hind axle take a round, range sensor 5 obtains a pulse signal, by 232 interfaces input computer, the computer backspace is instructed and is recorded this vertical section of road surface section and horizontal angle a to angular transducer 7
K(K=1,2,3,,, N) converts measured continuous gap length and respective angles to corresponding serial digital signal by analog-digital converter, by 232 input computers;
C. section curve shows: convert the length and the angle-data that record to corresponding serial digital signal by analog-digital converter, and 232 interfaces that pass through computer are imported computer, under the software computing of in placing computer, being correlated with, the vertical section of road surface section curve that calculates and draw and comprise short wavelength and long wavelength is finished data collection task;
D. deposit data deposits above-mentioned data and curve in the database ad hoc in the computer in;
E. whether carry out data analysis: on demand or enter next procedure, data analysis unit, or withdraw from and analyze running;
Data analysis unit is carried out as follows:
F. access data file, the data that deposited in are accessed, and descend three kinds of calculating of example respectively;
G. calculate international roughness index IRI value, utilize 1/4th vehicle simulation models and the second order dynamic differential equation software that are arranged in the computer to finish the calculating of IRI value;
H. basis of calculation mean square deviation utilizes the statistical method that is arranged in the computer;
I. calculate the surface evenness value, the surface evenness value that comprises positive and negative direction amplitude aggregate-value is to obtain by the statistical software that is arranged in the computer;
J. export the result and show and printing, by computer display screen and printer curve or result of calculation are shown or print on demand at last, and finish all to detect steps.
In addition, existing levelling instrument that other measures surface evenness is carried out timing, start-up system is demarcated the unit, carries out sensor angle calibration and system operational parameters then and sets, and gets back to whether data analysis at last, need just enter next step, does not need just to withdraw from.
Adopting method of the present invention to press 3 embodiment of example carries out 3 kinds of different road surfaces situations and detects: extremely smooth road surface, have the scrobicula slope the road surface, have the road surface on high protruding slope, obviously, the IRI value on first kind of road surface is less, the IRI value on second kind of road surface is big slightly, and the IRI value on the third road surface is then very big.
Embodiment 4
That describe is the planeness result who records from extremely smooth road surface.
At first set and gather 100 meters of distances, gather 0.3 meter of spacing, and data are imported notebook computer by data acquisition unit, earlier after section plotter is finished detection, the software that pre-sets in the computer memory carries out the road surface section curve of computational analysis acquisition as Fig. 5, and as the segmentation surface evenness of following routine table 1 is analyzed and the surface evenness analysis of table 2
Table 1. segmentation surface evenness is analyzed
| Section length (rice) | IRI value rice/km | Mean square deviation (centimetre) | The rollforward value (centimetre) | The negative sense aggregate-value (centimetre) | The speed meter per second |
| ?0～10 | ?3.83 | ?0.33 | ?1.54 | ?1.75 | ?0.52 |
| ?10～20 | ?1.93 | ?0.12 | ?0.78 | ?0.91 | ?0.6 |
| ?20～30 | ?3.19 | ?0.19 | ?1.35 | ?1.49 | ?0.65 |
| ?30～40 | ?3.55 | ?0.19 | ?1.75 | ?1.07 | ?0.66 |
| ?40～50 | ?1.85 | ?0.08 | ?0.52 | ?1.05 | ?0.64 |
| ?50～60 | ?3.04 | ?0.42 | ?2.34 | ?0.78 | ?0.49 |
| ?60～70 | ?3.88 | ?0.24 | ?1.19 | ?1.19 | ?0.64 |
| ?70～80 | ?4.88 | ?0.23 | ?1.26 | ?2.56 | ?0.66 |
| ?80～90 | ?1.53 | ?0.16 | ?0.85 | ?0.45 | ?0.7 |
| ?90～100 | ?2.75 | ?0.14 | ?0.91 | ?1.15 | ?0.78 |
The analysis of table 2. surface evenness
| |
30 centimetres |
| Gather distance | 100.8 rice |
| The distance that is used to analyze | From 0～100.8 meter |
| Have or not the obvious gradient | Not |
| The used long wavelength of data analysis | Comprise all wavelengths |
| International roughness index (IRI) | 3.2 rice/km |
| The standard mean square deviation | 0.5 centimetre |
| Speed | 0.63 meter per second |
| Absolute amplitude is counted greater than 3 millimeters | 195 |
| Absolute amplitude is counted greater than 5 millimeters | 119 |
| Absolute amplitude is counted greater than 8 |
44 |
| Absolute amplitude is counted greater than 10 millimeters | 26 |
| Absolute amplitude is counted greater than 12 millimeters | 12 |
| Absolute amplitude is counted greater than 15 |
3 |
| Forward amplitude aggregate-value | 12.5 centimetre |
| Negative sense amplitude aggregate-value | 13.6 centimetre |
That describe is the planeness result who records from the road surface that has the scrobicula slope.At first set and gather 100 meters of distances, gather 0.3 meter of spacing, and data are imported notebook computer by data acquisition unit, section plotter is finished and is detected the back and undertaken by the software that pre-sets in the computer memory that computational analysis obtains as the road surface section curve of Fig. 6, and as the segmentation surface evenness analysis of following routine table 3 and the surface evenness analysis of table 4.
Table 3. segmentation surface evenness is analyzed
| Section length (rice) | IRI value (rice/km) | Mean square deviation (centimetre) | The rollforward value (centimetre) | The negative sense aggregate-value (centimetre) | Speed (meter per second) |
| 0～10 | ?5.9 | ?30.94 | ?0.94 | ?11.92 | ?1.06 |
| 10～20 | ?2.77 | ?9.98 | ?0.0 | ?15.69 | ?0.83 |
| 20～30 | ?3.34 | ?17.66 | ?0.0 | ?17.22 | ?0.85 |
| 30～40 | ?3.07 | ?23.3 | ?0.0 | ?15.5 | ?0,9 |
| 40～50 | ?3.65 | ?24.92 | ?1.02 | ?2.65 | ?0.75 |
| 50～60 | ?6.75 | ?22.81 | ?3.67 | ?2.53 | ?0.63 |
| 60～70 | ?4.51 | ?20.45 | ?8.18 | ?0.02 | ?0.82 |
| 70～80 | ?4.0 | ?14.97 | ?14.61 | ?0.0 | ?0.88 |
| 80～90 | ?3.53 | ?9.43 | ?16.87 | ?0.0 | ?0.93 |
| 90～100 | ?2.75 | ?4.71 | ?11.43 | ?0.0 | ?0.81 |
The analysis of table 4. surface evenness
| Sampling |
30 centimetres |
| Gather distance | 101.4 rice |
| The distance that is used to analyze | From 0～100 meter |
| Have or not the obvious gradient | Have |
| The used long wavelength of data analysis | Comprise all wavelengths |
| International roughness index (IRI) | 4.6 rice/km |
| The standard mean square deviation | 19.9 centimetre |
| Speed | 0.84 meter per second |
| Absolute amplitude is counted greater than 3 millimeters | 334 |
| Absolute amplitude is counted greater than 5 millimeters | 332 |
| Absolute amplitude is counted greater than 8 millimeters | 331 |
| Absolute amplitude is counted greater than 10 millimeters | 331 |
| Absolute amplitude is counted greater than 12 millimeters | 330 |
| Absolute amplitude is counted greater than 15 millimeters | 329 |
| Forward amplitude aggregate-value | 57.8 centimetre |
| Negative sense amplitude aggregate-value | 65.5 centimetre |
That describe is the planeness result who records from the road surface that has high protruding slope.At first set and gather 48.6 meters of distances, gather 0.3 meter of spacing, and data are imported notebook computer by data acquisition unit, section plotter is finished and is detected the back and undertaken by the software that pre-sets in the computer memory that computational analysis obtains as the road surface section curve of Fig. 7, and as the segmentation surface evenness analysis of following routine table 5 and the surface evenness analysis of table 6.
Table 5. segmentation surface evenness is analyzed
| Section length (rice) | IRI value (rice/km) | Mean square deviation (centimetre) | The rollforward value (centimetre) | The negative sense aggregate-value (centimetre) | Speed (meter per second) |
| ?0～10 | ?32.14 | ?18.66 | ?56.26 | ?0.71 | ?0.68 |
| ?10～20 | ?21.86 | ?45.55 | ?63.53 | ?0.0 | ?0.72 |
| ?20～30 | ?45.97 | ?65.96 | ?29.1 | ?25.7 | ?0.71 |
| ?30～40 | ?18.18 | ?39.5 | ?0.0 | ?65.68 | ?0.77 |
The analysis of table 6. surface evenness
| Sampling interval |
| 30 centimetres | |
| Gather distance | 48.6 rice |
| The distance that is used to analyze | From 0～48.6 meter |
| Have or not the obvious gradient | Have |
| The used long wavelength of data analysis | Comprise all wavelengths |
| International roughness index (IRI) | 33.6 rice/km |
| The standard mean square deviation | 48.7 centimetre |
| Speed | 0.71 meter per second |
| Absolute amplitude is counted greater than 3 millimeters | 160 |
| Absolute amplitude is counted greater than 5 millimeters | 160 |
| Absolute amplitude is counted greater than 8 millimeters | 159 |
| Absolute amplitude is counted greater than 10 millimeters | 159 |
| Absolute amplitude is counted greater than 12 millimeters | 157 |
| Absolute amplitude is counted greater than 15 millimeters | 155 |
| Forward amplitude aggregate-value | 149.2 centimetre |
| Negative sense amplitude aggregate-value | 155.5 centimetre |
Claims (2)
1. detect the automation road surface section plotter of surface evenness, it is characterized in that: be made up of computer and detection platform, detection platform is made of base plate (8) and the face shield that covers base plate (8); Bearing (3), angular transducer (7) and range sensor (5) are housed on the base plate (8) successively, by power transmission shaft front-wheel (9) and trailing wheel (1) are housed respectively in the bearing (3), the distance between the front and back wheel equals the girth of trailing wheel; Single concave gear (2) is housed on the power transmission shaft of trailing wheel (1), and single concave gear (2) is corresponding with range sensor (5) level that is installed on the base plate (8) by support (4) and fixed screw (6); Angular transducer (7) is connected with computer by 232 interfaces with range sensor (5).
2. detect the method for surface evenness, comprise data acquisition unit and data analysis unit, data analysis unit is by default program with the VB language compilation in the computer memory: comprise the program software of 1/4th vehicle simulation models, second order dynamical equation, statistical method solution procedure, it is characterized in that: at first select the length measuring starting point and need to detect the highway section on road surface to be measured; The then range sensor (5) that is provided with by section plotter and be contained in the supporting collection of finishing range data of single concave gear (2) on the power transmission shaft, promptly when the unique recessed tooth of single concave gear (2) slips over range sensor (5) surperficial, range sensor (5) can produce a pulse signal, receives by computer 232 interfaces; Meanwhile, when the computer expert crosses 232 interfaces and receives this pulse signal, promptly can sample to the angular transducer on the section plotter (7) by 232 interface backspaces instruction, record this sampled point road surface longitudinal profile and horizontal angle, section plotter can guarantee trailing wheel girth of every walking, promptly can obtain a vertical section of road surface angle of slope value, obtain relative level height with this; Convert measured continuous gap length and respective angles to corresponding serial digital signal by analog-digital converter at last, and 232 interfaces that pass through computer are imported computer, related software is analyzed under the computing in computer, calculate and draw and comprise short wavelength and long wavelength's whole road section surface longitudinal profile curve, and descend three kinds of calculating of example respectively: international roughness index IRI value is calculated, standard mean square deviation calculating and comprise the surface evenness value calculating of positive and negative direction aggregate-value; Exporting the result at last shows and printing, the Overall Steps of detection of end.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011127961A CN1177104C (en) | 2001-04-29 | 2001-04-29 | Automatic surface section instrument for detecting road surface flatness and its detection method |
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| CNB011127961A CN1177104C (en) | 2001-04-29 | 2001-04-29 | Automatic surface section instrument for detecting road surface flatness and its detection method |
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| CN1177104C true CN1177104C (en) | 2004-11-24 |
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| CN101798793A (en) * | 2010-03-03 | 2010-08-11 | 清华大学 | Vehicular large-wave road shape measuring method and system |
| CN101914889A (en) * | 2010-08-10 | 2010-12-15 | 武汉武大卓越科技有限责任公司 | Laser evenness measuring system and method based on acceleration compensation |
| CN102095399B (en) * | 2010-12-15 | 2012-05-23 | 中国汽车工程研究院股份有限公司 | Road spectrum based method for extracting quantified road characteristic parameters |
| CN102182136B (en) * | 2011-02-18 | 2013-04-10 | 招商局重庆交通科研设计院有限公司 | Road section measuring instrument |
| CN102419331A (en) * | 2011-08-15 | 2012-04-18 | 长安大学 | System for carrying out image acquisition and analysis on crack defects of bridge structure |
| CN104949649B (en) * | 2015-05-26 | 2018-08-17 | 山东交通学院 | Road surface non-planeness measurement device |
| CN108510773A (en) * | 2017-02-28 | 2018-09-07 | 长城汽车股份有限公司 | Control method, system and the vehicle of vehicle |
| CN109211150A (en) * | 2018-08-07 | 2019-01-15 | 中国地质大学（武汉） | A kind of roughness measurement method and apparatus |
| CN109029353A (en) * | 2018-08-21 | 2018-12-18 | 广东省特种设备检测研究院东莞检测院 | A kind of off-highway vehicle travel route gradient measurer of going sightseeing |
| CN110409267A (en) * | 2019-08-12 | 2019-11-05 | 中国建筑第八工程局有限公司 | Surface evenness monitoring device and its detection method |
| CN110715643A (en) * | 2019-11-18 | 2020-01-21 | 上海宝冶市政工程有限公司 | Road longitudinal section elevation continuous measurement device |
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2001
- 2001-04-29 CN CNB011127961A patent/CN1177104C/en not_active Expired - Fee Related
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